<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
	<% String str=(String)request.getAttribute("str"); %>
	<%=str %>
	
	<br>
	el取值
	<br>
	str: ${str }
	<br>
	str2: ${str2 }
	<br>
	str3: ${str3 }
	<br>
	str3+ str4: ${str3+str4 }
	<br>
	str4>str3: ${str4 gt str3 }
	<br>
	str3>str4: ${str3 gt str4 }
	<br>
	str5: ${empty str5 }
	<br>
	str6: ${empty str6 }
	<br>
	${userName }
	<br>
    ${applicationScope.userName }
</body>
</html>